北京专用01 阅读培优小卷-2023年高一英语寒假培优阅读类提升小卷（多地区）

2023年高一英语寒假作业 阅读培优小卷 北京专用01 第一部分 阅读理解（共两节，满分50分） 第一节（共15小题；每小题2.5分，满分37.5分） 阅读下列短文，从每题所给的四个选项（A、B、C和D）中，选出最佳选项。 A （2022春·北京·高一北京市陈经纶中学） Love the way you walk Listen carefully to the footsteps in the family home, and you can probably work out who is walking about. The features most commonly used to identify people are faces, voices and fingerprints. But the way they walk is also a giveaway. Researchers have used video cameras and computers to analyze people’s gaits, and are now quite good at it. But translating such knowledge into a practical identification system can be tricky.  Cameras are often visible, are difficult to set up, require good lighting and may have their view blocked by other people. A team led by Dr. Ozanyan and Dr. Scully have been looking for a better way to recognize gait. Their answer: pressure-sensitive mats. Such mats are nothing new. They have been a part of security system. But Ozanyan and Scully use a complicated version that can record the amount of pressure applied in different paces as someone walks across it. These measurements form a pattern unique to the walker. The researchers turned to an artificial-intelligence system to recognize such patterns, and it seemed to work. In a study in 2018, they tested the system on a database of footsteps of 127 people. They found its error rate in identifying who was a mere 0. 7%. And Scully says even without a database of footsteps to work with, the system can determine some’s sex and, with reasonable accuracy, a subject’s age. One application of the mat-based gait-recognition system might be in health care, particularly for the elderly. A mat placed in a nursing home or an old person’s own residence could monitor changes in an individual’s gait that indicate certain illnesses. That would provide early warning of someone being at greater risk of falling over. Gait analysis might also be used as a security measure in the workplace, monitoring access to restricted areas, such as parts of m